udev rule works with command echo but not with cp command
Question about a `udev` rule that works with the `echo` command but not with the `cp` command. If you're encountering a similar issue with your `udev` rule, it could be related to environment variables and permissions. Here are some steps to help troubleshoot and resolve the problem: 1. **Check Permissions**: - Ensure that the `udev` rule has the necessary permissions to execute the `cp` command. Make sure that the rule's owner, group, and permissions are set correctly. You can use the `ls -l` command to inspect the rule file's permissions. 2. **Specify Full Paths**: - In your `udev` rule, specify the full path to the `cp` command. The rule might not be able to locate the `cp` command if the environment variables are not fully set. For example, use `/bin/cp` instead of just `cp`. 3. **Environment Variables**: - Environment variables like `PATH` might not be fully set when `udev` runs, and this can affect the execution of some commands. If specifying the full path d